A traction-type rice straw secondary cutting double-picking round bale baler and its use method

Abstract

The present invention discloses a traction-type rice straw secondary cutting double-pickup round baler and its use method. The baler comprises a cutting double-pickup device, a gear box disposed above the cutting double-pickup device, and a baling chamber formed by a front cabin and a rear cabin disposed behind the cutting double-pickup device. A netting device for tying straw bales is disposed above the front cabin. The cutting double-pickup device comprises a picker I, a horizontal disc cutter, and a picker II, which are sequentially arranged from front to rear. The cutting double-pickup device is provided with a feeding device, which comprises a feeding roller I located above and behind the picker I, a feeding roller II located above and in front of the picker II, an auger located above and behind the picker II, and a feeding roller III located above and behind the auger. A plurality of rollers for forming a bale core and applying pressure to the straw bale are sequentially disposed on the inner circumference of the baling chamber. The present invention can pick up rice straw stubble and standing stalks, thereby improving the rice straw picking rate of the round baler.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a traction-type rice straw secondary cutting and double-picking round bale baler and a use method thereof. Background Art

[0002] my country is a major agricultural country with a large rice-cultivating area and abundant rice straw resources. To reduce power consumption, rice combine harvesters typically choose to harvest with a high stubble retention rate, resulting in a large amount of rice straw remaining in the fields. This includes both the stubble cut by the combine and the remaining uncut rice straw.

[0003] The round bale balers currently used on the market only harvest straw stubble and do not pick up standing straw stalks, resulting in a low rice straw picking rate. Patent No. CN116406573A proposes a round straw baler that uses a ringless picker for picking up and a double-spline feed roller for feeding. The straw bale is pressure-regulated by a mechanical pressure regulating device, but it does not cut and pick up standing straw stalks and can only pick up straw stubble. Patent No. CN114793638A proposes a camless picker for square bale balers and Patent No. CN113950960A proposes a five-axis camless split picker. Both adopt a camless design, which can effectively avoid collisions between the spring tooth guard plate and the spring teeth, facilitate replacement of the spring tooth assembly, and improve the life of the spring teeth and picking efficiency. The patent with publication number CN201585259U proposes a disc-type straw cutter that can achieve continuous rotary cutting. The coordination performance between the mechanisms is good and the standing straw can be effectively cut, but the straw is not collected.

[0004] Therefore, a round bale baler that performs secondary cutting on rice straw is needed. Summary of the Invention

[0005] In view of the defects of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a traction-type rice straw secondary cutting and double-picking round bale baler and a method of using the same, which can pick up rice straw stubble and standing stalks, and improve the picking rate of rice straw by the round bale baler.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical measures:

[0007] The traction-type rice straw secondary cutting double-picking round bale baler of the present invention comprises a traction frame connected to the rear suspension frame of the tractor, a cutting double-picking device is provided at the rear of the traction frame, a gear box connected to the power output shaft of the tractor is provided above the cutting double-picking device, and a bale rolling chamber formed by a front cabin and a rear cabin is provided at the rear of the cutting double-picking device; a net winding device for tying straw bales is provided at the front upper part of the front cabin; the cutting double-picking device comprises a picker I, a horizontal disc cutter and a picker II arranged in sequence from front to rear; a feeding device is provided in the cutting double-picking device, and the rear end of the feeding device is connected to the front cabin; The feeding device includes a feeding roller I located above and behind the picker I, a feeding roller II located above and in front of the picker II, a left auger located above and behind the picker II and installed on the left side plate of the cutting double picking device, a right auger located on the same axis as the left auger and installed on the right side plate of the cutting double picking device, and a feeding roller III located above and behind the left auger; the inner circumference of the baling chamber is sequentially provided with a plurality of rollers for forming the bale core of the straw bale and pressurizing the straw bale; and it also includes a transmission system connected to the gear box and distributed on both sides of the baling chamber, and the transmission system is used to drive the cutting double picking device, the feeding device and each roller to move.

[0008] Preferably, the structures of the pickup I and the pickup II are the same, both including a pickup main shaft, a pickup welded body connected to the pickup main shaft, a pickup guard plate connected to the partition of the cutting double pickup device, and a pickup spring tooth connected to the outer periphery of the pickup welded body; the pickup spring tooth extends from the gap of the pickup guard plate.

[0009] Furthermore, the horizontal disc cutter includes a small gear box, a horizontal disc cutter transmission gear connected to the small gear box, a horizontal disc cutter vertical shaft connected to the horizontal disc cutter transmission gear, a horizontal disc cutter disc connected to the horizontal disc cutter vertical shaft, and a horizontal disc cutter blade connected to the horizontal disc cutter disc.

[0010] Furthermore, the transmission system includes a chain V connected to the right output shaft of the gearbox and a chain I connected to the left output shaft of the gearbox. After the power is output from the left side of the gearbox, it is transmitted to the left auger, pickup II, and feeding roller II in sequence through the chain I. A tensioning pulley I is arranged between the output shaft on the left side of the gearbox and the left auger; the power transmitted to the feeding roller II is transmitted to the feeding roller I through the main shaft of the feeding roller II and the chain VI; the power transmitted to the pickup II is transmitted to the pickup I through the main shaft of the pickup II and the chain VII; the power transmitted to the pickup I is transmitted to the horizontal disc cutter through the main shaft of the pickup I and the chain II; the power transmitted to the horizontal disc cutter is transmitted downward to the horizontal disc cutter transmission gear through the bevel gear in the small gear box, and the horizontal disc cutter disc and the horizontal disc cutter blade are rotated through the horizontal disc cutter vertical shaft.

[0011] Preferably, the first roller above the feeding port of the bale chamber is roller I, and the remaining rollers are rollers II to XV in clockwise order; after the power is output from the right side of the gear box, it is transmitted to the right auger, feeding roller III, and roller I in sequence through chain V, and a tensioning wheel II is provided between the right auger and roller I; the power transmitted to roller I is transmitted to roller XV through the main shaft of roller I and chain III; the secondary sprocket of roller XV is transmitted to roller XIII, roller XV in sequence through chain IV The secondary sprocket on the right side of roller I is sequentially transmitted to roller II, roller III, and roller IV through chain VIII, and a tensioning pulley III is provided between roller I and roller IV; the secondary sprocket of roller IV is transmitted to roller V through chain IX; the secondary sprocket of roller V is sequentially transmitted to roller VI, roller VI, roller VII, roller VIII, roller IX, roller X, roller XI, and roller XII through chain X, and a tensioning pulley IV is provided between roller V and roller XII.

[0012] Preferably, a guide is provided on the upper front of the cutting double picking device, and the connecting rod of the guide is connected to the two side plates of the cutting double picking device; the guide is used in conjunction with the picker 1 to prevent the picker 1 from throwing the straw too high.

[0013] Furthermore, the feed roller I, feed roller II and feed roller III each include a feed roller steel tube, a feed roller half-shaft I and a feed roller half-shaft II installed at both ends of the feed roller steel tube, and a feed fork group equidistantly arranged on the outer circumference of the feed roller steel tube; the feed roller half-shaft I and the feed roller half-shaft II are connected to the left and right side plates of the cutting double-picking device, every two feed forks constitute a feed fork group, and the fork tips of the feed forks are arranged in a symmetrical spiral shape.

[0014] Furthermore, a walking device is provided at the bottom of the front cabin, and a contour wheel is provided below the cutting and double-picking device; a bale placing device is provided above the walking device, and the upper end of the bale placing device is connected to the front cabin; the front cabin and the rear cabin are hinged at the upper end of the compartment surface, closed when baling, and opened by a hydraulic system when placing the bales, and the straw bales roll down from the bale rolling chamber under the action of the bale placing device.

[0015] Accordingly, the method for using the traction-type rice straw secondary cutting and double-picking round bale baler of the present invention comprises the following steps:

[0016] Step 1: The tractor's towing port is connected to the front end of the towing frame, and the tractor's power output shaft is connected to the input shaft of the gearbox. The power is transmitted to each moving part through the gearbox and the transmission system;

[0017] Step 2: The tractor is pulled forward, and the picker I picks up the rice straw stubble while moving forward. The rice straw is then transported to the rear by the feeding rollers I and II. The running horizontal disc cutter cuts the standing rice straw, which is then picked up by the picker II. The left auger, the right auger, and the feeding rollers III continuously feed the picked rice straw into the baling chamber.

[0018] Step 3: After the rice straw passes through the feeding device, it enters the bale chamber consisting of a front compartment and a rear compartment. The rollers located on the inner circumference of the bale chamber rotate in the same direction under the action of the transmission system. The rice straw in the bale chamber rotates along rollers XV, XIV, XIII, XII, XI, X, IX, and VIII. After rising to a certain height, it falls back under the action of gravity to form the bale core of the straw bale.

[0019] Step 4: As the baler moves forward, the amount of rice straw picked up continues to increase. When the bale chamber is full of straw, the rotation of the roller will pressurize the straw bale.

[0020] Step 5: When the straw bales reach the preset density, the circuit system starts the net winding device to bundle the straw bales. After bundling is completed, the rear cabin is opened under the action of the hydraulic system, and the straw bales roll out of the bale rolling chamber under the action of the bale releasing device.

[0021] Compared with the prior art, the traction-type rice straw secondary cutting and double-picking round bale baler and its use method of the present invention have at least the following advantages and beneficial effects:

[0022] 1. The present invention is used for harvesting rice straw. During operation, the tractor is pulled and driven. The picker I picks up the cut rice straw stubble. The horizontal disc cutter cuts the rice straw into standing stalks and picks up the rice straw by the picker II. The rice straw is transported to the baling chamber through the feeding device. The material is gradually rolled into round bales under the action of rotating rollers in the baling chamber and pressurized. When the straw bale reaches a certain density, the net winding device is activated to bundle the straw bales. Finally, the rear compartment of the baling chamber is opened to release the straw bales.

[0023] 2. Combine the picker and straw cutter, and use two pickers to pick up straw stubble and standing stalks respectively to prevent the straw stubble from being entangled in the horizontal disc cutter.

[0024] 3. The present invention uses a cutting double-picking device and a feeding device as main components to design a traction-type rice straw secondary cutting double-picking round baler. This machine innovates the traditional round baler whose pickers can only pick up stubble, designs a cutting double-picking device, and designs a corresponding feeding device based on the cutting double-picking device; in order to solve the problems of coexistence of rice straw stubble and standing stalks and a large amount of rice straw in the field, a picking-cutting-picking double-picking process is adopted to pick up the rice straw, thereby achieving the purpose of improving the straw picking rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the axonometric structure of the traction-type rice straw secondary cutting and double-picking round bale baler of the present invention;

[0027] Figure 2 It is a schematic diagram of the left side structure of the traction-type rice straw secondary cutting and double picking round bale baler of the present invention;

[0028] Figure 3 It is a schematic diagram of the right side structure of the traction-type rice straw secondary cutting and double picking round bale baler of the present invention;

[0029] Figure 4 Schematic diagram of the cross-sectional structure of the cutting double-picking device of the present invention;

[0030] Figure 5 Schematic diagram of the cross-sectional structure of the front cabin and rear cabin of the present invention

[0031] Figure 6 It is a schematic diagram of the axonometric structure of the pickup of the present invention;

[0032] Figure 7 It is a structural schematic diagram of the horizontal disc cutter of the present invention;

[0033] Figure 8 This is a schematic diagram of the axonometric structure of the feed roller of the present invention;

[0034] Figure 9 It is a schematic cross-sectional structural diagram of the net winding device of the present invention.

[0035] In the figure: 1-traction frame, 2-gear box, 3-cutting double picking device, 4-guide, 5-contact wheel, 6-feeding device, 7-front cabin, 8-rear cabin, 9-net winding device, 10-baling device, 11-traveling device, 12-transmission system, 13-hydraulic system, 14-circuit system, 301-picker I, 302-horizontal disc cutter, 303-picker II, 301.1-picker spring teeth, 301.2-picker welding body, 301.3-picker main shaft , 301.4-pickup guard, 302.1-horizontal disc cutter blade, 302.2-horizontal disc cutter disc, 302.3-horizontal disc cutter vertical shaft, 302.4-horizontal disc cutter transmission gear, 601-feed roller I, 602-feed roller II, 603-left auger, 604-feed roller III, 601.1-feed roller half shaft I, 601.2-feed fork, 601.3-feed roller steel pipe, 601.4-feed roller half shaft II, 90 1-net, 902-net shaft, 903-net pressing shaft, 904-pressing roller I, 905-support shaft, 906-pressing roller II, 907-stretching shaft, 908-pressing roller III, 909-net cutting knife, 910-pressure sensor, 1201-chain I, 1202-chain II, 1203-chain III, 1204-chain IV, 1205-chain V, 1206-chain VI, 1207-chain VII, 1208-chain VIII, 1209-chain Chain IX, 1210-chain X, 1211-roller I, 1212-roller II, 1213-roller III, 1214-roller IV, 1215-roller V, 1216-roller VI, 1217-roller VII, 1218-roller VIII, 1219-roller IX, 1220-roller X, 1221-roller XI, 1222-roller XII, 1223-roller XIII, 1224-roller XIV, 1225-roller XV. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] like Figures 1 to 9 As shown, the traction-type rice straw secondary cutting and double-picking round baler of the present invention mainly consists of a traction frame 1, a gear box 2, a cutting and double-picking device 3, a guide 4, a contour wheel 5, a feeding device 6, a front cabin 7, a rear cabin 8, a net winding device 9, a bale placing device 10, a walking device 11, a transmission system 12, a hydraulic system 13 and a circuit system 14.

[0038] The front of the traction frame 1 is connected to the rear suspension frame of the tractor, and the rear of the traction frame 1 is connected to the cutting double picking device 3. The gear box 2 is located above the cutting double picking device 3, and the input shaft of the gear box 2 is connected to the power output shaft of the tractor.

[0039] The cutting and picking device 3 consists of a picker I301, a horizontal disc cutter 302, and a picker II303, arranged in order from front to back. A guide 4 is located at the front and upper portion of the cutting and picking device 3. The guide 4's connecting rod is connected to the two side plates of the cutting and picking device 3. A contouring wheel 5 is located below the cutting and picking device 3. The guide 4 works in conjunction with the picker I301 to prevent the picker I301 from throwing straw too high and onto the upper cover of the cutting and picking device 3.

[0040] The feeding device 6 is located within the cutting and double-picking device 3 and primarily consists of a feeding roller I 601, a feeding roller II 602, a left auger 603, a right auger, and a feeding roller III 604. Below the feeding device 6 are the pickers I 301 and II 303 of the cutting and double-picking device 3. The rear end of the feeding device 6 is connected to the front cabin 7, which together with the rear cabin 8 form a bale-rolling chamber. The inner periphery of the bale-rolling chamber is sequentially provided with a plurality of rollers for forming the bale core and applying pressure to the straw bales. The front cabin 7 and the rear cabin 8 are hinged at the upper end of the compartment surface, closing when forming a bale and opening by a hydraulic system 13 when releasing the bale. The left and right auger 603 are provided because the picker width is wider than the bale-rolling chamber. The left and right augers work together to transport the straw toward the center.

[0041] The net wrapping device 9 is located above and in front of the front cabin 7 and is used to tie straw bales. The bale placing device 10 is located above the running gear 11. Its upper end is connected to the front cabin 7, and its lower end is connected to the running gear 11. The running gear 11 is located at the bottom of the front cabin 7, with the bale placing device 10 positioned above it. The bale placing device 10 consists of two crossbeams connected to the rear wheel connecting axis, oriented in the machine's forward direction. The transmission system 12, hydraulic system 13, and electrical system 14 are primarily located in front of and on both sides of the bale winding chamber.

[0042] like Figure 1 、 Figure 4 As shown, the gearbox 2 adopts a bevel gear transmission form. The output shaft of the tractor is connected to the input shaft of the gearbox 2. After the power enters the gearbox 2, it is transmitted to both sides of the machine through two pairs of bevel gears and two output shafts. Sprockets are installed on the output shafts on both sides of the gearbox 2, and the power is further transmitted through chain transmission. The left output shaft of the gearbox 2 is connected to the chain I1201 of the transmission system 12, and the right output shaft of the gearbox 2 is connected to the chain V1205 of the transmission system 12. A mounting seat is provided at the bottom of the gearbox 2 for fixing to the cover plate above the cutting double device 3.

[0043] like Figure 3-6 As shown, the picker I301 is located at the front of the cutting double picking device 3, the horizontal disc cutter 302 is located behind the picker I301, and the picker II303 is located behind the horizontal disc cutter 302; the feeding roller I601 is located at the upper rear of the picker I301, the feeding roller II602 is located at the upper front of the picker II303, the left auger 603 is located at the upper rear of the picker II303, and is installed on the left side plate of the cutting double picking device 3, the right auger and the left auger 603 are located on the same axis, and are installed on the right side plate of the cutting double picking device 3, and the feeding roller III604 is located at the upper rear of the left auger 603.

[0044] like Figure 6 As shown, Pickup I 301 and Pickup II 303 have the same structure, both including a pickup spindle 301.3, a pickup welded body 301.2 connected to the pickup spindle 301.3, a pickup guard plate 301.4 connected to the partition of the cutting dual pickup device 3, and a pickup spring tine 301.1 connected to the outer periphery of the pickup welded body 301.2. The pickup spring tine 301.1 extends from the gap in the pickup guard plate 301.4. Pickup I 301 and Pickup II 303 adopt a camless design. The pickup spring tine 301.1 is connected to the outer periphery of the pickup welded body 301.2, the pickup welded body 301.2 is connected to the pickup spindle 301.3, and the pickup guard plate 301.4 is connected to the partition of the cutting dual pickup device 3.

[0045] like Figure 4 、 Figure 7As shown, the horizontal disc cutter 302 includes a small gear box, a horizontal disc cutter transmission gear 302.4 connected to the small gear box, a horizontal disc cutter vertical shaft 302.3 connected to the horizontal disc cutter transmission gear 302.4, a horizontal disc cutter disc 302.2 connected to the horizontal disc cutter vertical shaft 302.3, and a horizontal disc cutter blade 302.1 connected to the horizontal disc cutter disc 302.2.

[0046] like Figure 8 As shown, the feed roller I601 and the feed roller II602 have the same structure, the feed roller III604 has a similar structure to the feed roller I601, but the number of feed forks 601.2 is different. The feed roller half-shaft I601.1 and the feed roller half-shaft II601.4 are installed at both ends of the feed roller steel tube 601.3. The feed roller half-shaft I601.1 and the feed roller half-shaft II601.4 are connected to the left and right side plates of the cutting double picking device 3. Every two feed forks 601.2 form a group. The feed fork group composed of the feed forks 601.2 is arranged at equal intervals on the outer circumference of the feed roller steel tube 601.3, and the fork tips of the feed forks 601.2 are arranged in a symmetrical spiral shape.

[0047] like Figure 9 As shown, in the net wrapping device 9, the net roll is installed on the net shaft 902, and the net pressing shaft 903 is pressed on the net roll, and the net 901 passes around the support shaft 905, the stretching shaft 907, the pressure roller II906, the pressure roller I904 and the pressure roller III908 in sequence, and finally enters the winding chamber; when working, after the straw bale triggers the pressure sensor 910, the net wrapping controller starts the drive motor, and the pressure roller I904 is connected to the drive motor. The net 901 is driven by the pressure roller I904 and the roller in the winding chamber to wrap the straw bale. When the net wrapping amount reaches the set value, the net wrapping controller triggers the net cutter 909 to fall and stops the rotation of the pressure roller I904, cutting the net 901 to complete the net wrapping. When the rear cabin 8 is opened to drop the bale, the net wrapping controller is reset, and the net cutter 909 is reset at the same time to prepare for the next net wrapping.

[0048] like Figures 1 to 5As shown, the first roller above the feeding port of the bale chamber is roller I1211, and the remaining rollers are rollers II1212 to XV1225 in clockwise order. After the power is output from the left side of the gear box 2, it is transmitted to the left auger 603, the picker II303, and the feeding roller II602 in sequence through the chain I1201. A tensioning pulley I is provided between the output shaft on the left side of the gear box 2 and the left auger 603. The power transmitted to the feeding roller II602 is transmitted to the feeding roller I601 through the main shaft of the feeding roller II602 and the chain VI1206. The power of the picker II303 is transmitted to the picker I301 through the main shaft of the picker II303 and the chain VII1207; the power transmitted to the picker I301 is transmitted to the horizontal disc cutter 302 through the main shaft of the picker I301 and the chain II1202; the power transmitted to the horizontal disc cutter 302 is transmitted downward to the horizontal disc cutter transmission gear 302.4 through the bevel gear in the small gear box, and the horizontal disc cutter disc 302.2 and the horizontal disc cutter blade 302.1 are rotated through the horizontal disc cutter vertical shaft 302.3.

[0049] After the power is output from the right side of the gearbox 2, it is transmitted to the right auger, feeding roller III604, and roller I1211 in sequence through the chain V1205. A tensioning wheel II is provided between the right auger and roller I1211. The power transmitted to roller I1211 is transmitted to roller XV1225 through the main shaft of roller I1211 and chain III1203. The secondary sprocket of roller XV1225 is transmitted to roller XIII1223 and roller XIV1224 in sequence through chain IV1204. The secondary sprocket on the right side of roller I1211 is transmitted to roller II1212 and roller XIV1224 in sequence through chain VIII1208. Drum III1213, roller IV1214, a tensioning pulley III is arranged between roller I1211 and roller IV1214; the secondary sprocket of roller IV1214 is transmitted to roller V1215 through chain IX1209; the secondary sprocket of roller V1215 is transmitted to roller VI1215, roller VI1216, roller VII1217, roller VIII1218, roller IX1219, roller X1220, roller XI1221, roller XII1222 in sequence through chain X1210, and a tensioning pulley IV is arranged between roller V1215 and roller XII1222.

[0050] In addition, the method for using the traction-type rice straw secondary cutting and double-picking round bale baler of the present invention comprises the following steps:

[0051] During operation, the tractor's traction port is connected to the front end of the traction frame 1 of the present invention, and the tractor's power output shaft is connected to the input shaft of the gearbox 2 of the present invention. Power is transmitted to various moving parts through the gearbox 2 and the transmission system 12. The present invention is pulled forward by the tractor. As it moves forward, the operating picker I301 picks up rice straw stubble, which is then transported rearward by the feeding roller I601 and the feeding roller II602. The operating horizontal disc cutter 302 cuts the standing rice straw, which is then picked up by the picker II303. The left auger 603, the right auger, and the feeding roller III604 continuously feed the picked rice straw into the baling chamber.

[0052] After passing through the feeding device 6, the rice straw enters the baling chamber composed of the front compartment 7 and the rear compartment 8. The rollers located on the inner circumference of the baling chamber rotate in the same direction under the action of the transmission system 12. The rice straw in the baling chamber rotates along rollers XV1225, XIV1224, XIII1223, XII1222, XI1221, X1220, IX1219, and VIII1218. After rising to a certain height, it falls back under the action of gravity to form the bale core of the straw bale.

[0053] As the baler moves forward, the amount of rice straw picked up continues to increase. When the bale chamber is full of straw, the rotation of the roller will pressurize the straw bale.

[0054] When the straw bales reach a preset density, the circuit system 14 starts the net winding device 9 to bundle the straw bales. After bundling is completed, the rear cabin 8 is opened under the action of the hydraulic system 13, and the straw bales roll out of the rolling chamber under the action of the bale placing device 10.

[0055] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be understood by anyone familiar with the technology within the technical scope disclosed by the present invention should be included in the scope of the present invention.

Claims

1. A traction-type rice straw secondary cutting and double picking round bale baler, comprising a traction frame (1) connected to a rear suspension frame of a tractor, characterized in that: A cutting and double-picking device (3) is provided at the rear of the traction frame (1); a gear box (2) connected to the power output shaft of the tractor is provided above the cutting and double-picking device (3); a bale rolling chamber formed by a front cabin (7) and a rear cabin (8) is provided at the rear of the cutting and double-picking device (3); a net wrapping device (9) for tying straw bales is provided above the front cabin (7); The cutting and double-picking device (3) comprises a picker I (301), a horizontal disc cutter (302) and a picker II (303) which are arranged in sequence from front to back; The cutting double-picking device (3) is provided with a feeding device (6), the rear end of which is connected to the front cabin (7); the feeding device (6) comprises a feeding roller I (601) located above and behind the picker I (301), a feeding roller II (602) located above and in front of the picker II (303), a left auger (603) located above and behind the picker II (303) and mounted on the left side plate of the cutting double-picking device (3), a right auger located on the same axis as the left auger (603) and mounted on the right side plate of the cutting double-picking device (3), and a feeding roller III (604) located above and behind the left auger (603); A plurality of rollers for forming a bale core of the straw bale and pressurizing the straw bale are sequentially arranged on the inner circumference of the bale rolling chamber; It also includes a transmission system (12) that is transmission-connected to the gear box (2) and distributed on both sides of the winding and baling chamber. The transmission system (12) is used to drive the cutting and double-picking device (3), the feeding device (6) and each roller to move.

2. The traction-type rice straw secondary cutting and double-picking round baler according to claim 1 is characterized by: The pickup I (301) and the pickup II (303) have the same structure, both comprising a pickup main shaft (301.3), a pickup welding body (301.2) connected to the pickup main shaft (301.3), a pickup guard plate (301.4) connected to the partition plate of the cutting double pickup device (3), and a pickup spring tooth (301.1) connected to the outer periphery of the pickup welding body (301.2); the pickup spring tooth (301.1) extends from the gap of the pickup guard plate (301.4).

3. The traction-type rice straw secondary cutting and double-picking round bale baler according to claim 2, characterized in that: The horizontal disc cutter (302) comprises a small gear box, a horizontal disc cutter transmission gear (302.4) connected to the small gear box, a horizontal disc cutter vertical shaft (302.3) connected to the horizontal disc cutter transmission gear (302.4), a horizontal disc cutter blade (302.1) connected to the horizontal disc cutter blade (302.2).

4. The traction-type rice straw secondary cutting and double picking round bale baler according to claim 3, characterized in that: The transmission system (12) comprises a chain V (1205) connected to the right output shaft of the gear box (2) and a chain I (1201) connected to the left output shaft of the gear box (2). After the power is output from the left side of the gear box (2), it is sequentially transmitted to the left auger (603), the picker II (303), and the feeding roller II (602) through the chain I (1201). A tensioning wheel I is provided between the output shaft on the left side of the gear box (2) and the left auger (603). The power transmitted to the feeding roller II (602) is transmitted to the feeding roller I (601) through the main shaft of the feeding roller II (602) and the chain VI (1206). The power to the pickup II (303) is transmitted to the pickup I (301) through the main shaft of the pickup II (303) and the chain VII (1207); the power transmitted to the pickup I (301) is transmitted to the horizontal disc cutter (302) through the main shaft of the pickup I (301) and the chain II (1202); the power transmitted to the horizontal disc cutter (302) is transmitted downward to the horizontal disc cutter transmission gear (302.4) through the bevel gear in the small gear box, and the horizontal disc cutter cutter disc (302.2) and the horizontal disc cutter blade (302.1) are rotated through the horizontal disc cutter vertical shaft (302.3).

5. The traction-type rice straw secondary cutting and double picking round bale baler according to claim 4, characterized in that: The first roller above the feeding port of the bundling chamber is roller I (1211), and the remaining rollers are roller II (1212) to roller XV (1225) in clockwise order; after the power is output from the right side of the gear box (2), it is transmitted to the right auger, feeding roller III (604), and roller I (1211) in sequence through chain V (1205), and a tensioning wheel II is provided between the right auger and roller I (1211); the power transmitted to roller I (1211) is transmitted to roller XV (1225) through the main shaft of roller I (1211) and chain III (1203); the secondary sprocket of roller XV (1225) is transmitted to roller XIII (1223) and roller XIV (1224) in sequence through chain IV (1204); the secondary sprocket on the right side of roller I (1211) is transmitted through chain Chain VIII (1208) is sequentially transmitted to roller II (1212), roller III (1213), and roller IV (1214), and a tensioning wheel III is provided between roller I (1211) and roller IV (1214); the secondary sprocket of roller IV (1214) is transmitted to roller V (1215) through chain IX (1209); the secondary sprocket of roller V (1215) is sequentially transmitted to roller VI (1215), roller VI (1216), roller VII (1217), roller VIII (1218), roller IX (1219), roller X (1220), roller XI (1221), and roller XII (1222) through chain X (1210), and a tensioning wheel IV is provided between roller V (1215) and roller XII (1222).

6. The traction-type rice straw secondary cutting and double picking round bale baler according to claim 1, characterized in that: A guide (4) is provided on the upper front of the cutting double picking device (3), and a connecting rod of the guide (4) is connected to the two side plates of the cutting double picking device (3); the guide (4) and the picker I (301) are used in conjunction to prevent the picker I (301) from throwing the straw too high.

7. The traction-type rice straw secondary cutting and double picking round bale baler according to claim 1, characterized in that: The feeding roller I (601), feeding roller II (602) and feeding roller III (604) each include a feeding roller steel tube (601.3), a feeding roller half-shaft I (601.1) and a feeding roller half-shaft II (601.4) installed at both ends of the feeding roller steel tube (601.3), and a feeding fork group arranged at equal intervals on the outer circumference of the feeding roller steel tube (601.3); The feeding roller half shaft I (601.1) and the feeding roller half shaft II (601.4) are connected to the left and right side plates of the cutting double picking device (3). Every two feeding forks (601.2) form a feeding fork group, and the fork tips of the feeding forks (601.2) are arranged in a symmetrical spiral shape.

8. The traction-type rice straw secondary cutting and double picking round bale baler according to claim 1, characterized in that: A walking device (11) is provided at the bottom of the front cabin (7), and a contour wheel (5) is provided below the cutting and double-picking device (3); a bale placing device (10) is provided above the walking device (11), and the upper end of the bale placing device (10) is connected to the front cabin (7); the front cabin (7) and the rear cabin (8) are hinged at the upper end of the compartment surface, closed when baling, and opened by a hydraulic system (13) when baling, and the straw bales roll down from the bale rolling chamber under the action of the bale placing device (10).

9. A method for using the traction-type rice straw secondary cutting and double-picking round baler according to claim 8, characterized in that: The steps include: Step 1: The tractor's traction port is connected to the front end of the traction frame (1), and the tractor's power output shaft is connected to the input shaft of the gear box (2). The power is transmitted to each moving part through the gear box (2) and the transmission system (12); Step 2: The tractor is pulled forward, and the picker I (301) that is in operation picks up the rice straw stubble and transports it to the rear by the feeding roller I (601) and the feeding roller II (602). The running horizontal disc cutter (302) cuts the standing rice straw and the picker II (303) picks it up. The left auger (603), the right auger and the feeding roller III (604) continuously feed the picked rice straw into the baling chamber. Step 3: After the rice straw passes through the feeding device (6), it enters the bale chamber composed of the front compartment (7) and the rear compartment (8). The rollers located on the inner periphery of the bale chamber rotate in the same direction under the action of the transmission system (12). The rice straw in the bale chamber rotates along roller XV (1225), roller XIV (1224), roller XIII (1223), roller XII (1222), roller XI (1221), roller X (1220), roller IX (1219), and roller VIII (1218). After rising to a certain height, it falls back under the action of gravity to form the bale core of the straw bale. Step 4: As the baler moves forward, the amount of rice straw picked up continues to increase. When the bale chamber is full of straw, the rotation of the roller will pressurize the straw bale. Step 5: When the straw bales reach a preset density, the circuit system (14) starts the net wrapping device (9) to bundle the straw bales. After bundling is completed, the rear compartment (8) is opened under the action of the hydraulic system (13), and the straw bales roll out of the bale rolling chamber under the action of the bale placing device (10).

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